Update README.md

Author: dchakarwarti

README.md

@@ -17,21 +17,13 @@ Proto Processing Library's implementation of field masks diverges from the
 AIP-161 standard in the following key ways. This table summarizes the
 similarities/differences:
 
-| Feature          | AIP-161 (Standard)          | Library Implementation     |
-| :--------------- | :-------------------------- | :------------------------- |
-| Repeated fields  | Restricted except at path   | No restriction, allowed on |
-:                  : end                         : non-leaf nodes             :
-| Map keys         | String or integer           | String (escaped)           |
-| Wildcards        | Supported for repeated      | Supported                  |
-:                  : fields/maps                 :                            :
-| Struct traversal | Supported using '.'         | Supported                  |
-| Map traversal    | Supported using '.', keys:  | Supported (string/int      |
-:                  : string/int                  : keys), '.' insertion not   :
-:                  :                             : supported                  :
-| Validation       | Ignore invalid reads, error | Error on invalid field     |
-:                  : on writes                   : names                      :
-| Update behavior  | Read after masked update    | Not supported              |
-:                  : returns same                :                            :
-| Intersection     | Not explicitly mentioned    | Supported, returns         |
-:                  :                             : intersection of two        :
-:                  :                             : FieldMask trees            :
+| Feature          | AIP-161 (Standard)                     | Library Implementation                                    |
+| :--------------- | :--------------------------            | :-------------------------                                |
+| Repeated fields  | Restricted except at path end          | No restriction, allowed on non-leaf nodes                 |
+| Map keys         | String or integer                      | String (escaped)                                          |
+| Wildcards        | Supported for repeated fields/maps     | Supported                                                 |
+| Struct traversal | Supported using '.'                    | Supported                                                 |
+| Map traversal    | Supported using '.', keys: string/int  | Supported (string/int keys), '.' insertion not supported  |
+| Validation       | Ignore invalid reads, error on writes  | Error on invalid field names                              |
+| Update behavior  | Read after masked update returns same  | Not supported                                             |
+| Intersection     | Not explicitly mentioned               | Supported, returns intersection of two FieldMask trees    |